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Teaching Fractions: Strategies Used for Teaching Fractions to Middle Grades Students
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Abstract. Fractions are often difficult for students to fully comprehend. Teachers must find a variety of strategies to use in the classroom for teaching fractions. This study was conducted to identify effective strategies used by middle school teachers in order to find ways to improve fraction instruction. For four months, data were collected in 12 classrooms, using observation notes, interviews, and videotaping. Findings are discussed within a constructivist framework.
The National Council of Teachers of Mathematics (NCTM, 2000) states that students in middle school should acquire a deep ...
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Forms of phosphorus in virgin and fertilised calcareous soils of Western Australia.
Magazine article from: Australian Journal of Soil Research
; ...compounds that may exist in calcareous soils. Jiang and Gu...fractionation scheme for calcareous soils by which inorganic phosphate in soil could be divided into...and Colwell (1963) soil tests. Materials and methods Soils and climate This study...bush from 8 sites on ...
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Methods of pH determination in calcareous soils: use of electrolytes and suspension effect.(Short Communication)
Magazine article from: Australian Journal of Soil Research
; ...accurate methods for soil pH determination...also developed for calcareous saline soils, especially from...stirring of the soil suspension, on the pH of calcareous soils. Materials and...w] values in calcareous soils were also higher...H.sub.k]. Soil pH values ...
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Groundwater Phosphorus and Trace Element Concentrations from Organically Amended Sandy And Calcareous Soils of Florida
Magazine article from: Compost Science & Utilization
; ...two years for both soils from wells above and...wells in the sandy soil at Ft. Pierce, one...sup -1^ for the calcareous soil at Homestead...study. Due to the calcareous soil at Homestead, trace...fertilizers in the sandy and calcareous soils of peninsular Florida...
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Relationship between phosphorus fractions and properties of highly calcareous soils.
Magazine article from: Australian Journal of Soil Research
; ...different P fractions and soil properties. Soils and Torrent (1989b...Al.sub.d]) in calcareous soils of Iran, respectively...fractionation and selected soil properties in some highly calcareous soils. Materials and methods...
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Impact of Organic Amendments on Groundwater Nitrogen Concentrations for Sandy and Calcareous Soils
Magazine article from: Compost Science & Utilization
; ...of two years for both soils. Statistical analysis...groundwater was higher in calcareous soil (mean=5.3 mg...throughout the experiment. Calcareous soil had lower NH^sub 4...mg/L) than sandy soils (mean=0.7 mg...
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Mobility and Distribution of Zinc, Cadmium and Lead in Calcareous Soils Receiving Spiked Sewage Sludge
Magazine article from: Soil & Sediment Contamination
; ...spiked sewage sludge in calcareous soils. A total of...were set up for four calcareous soils. Each column...sludge (only for two soils), spiked sewage sludge...leaching experiments, soil samples from each column...higher than Zn and Pb in soils leached with spiked sewage ...
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Comparison of extraction techniques for measuring exchangeable cations in calcareous soils.
Magazine article from: Australian Journal of Soil Research
; ...Laboratory Handbook of Soil and Water Chemical...technique for alkaline soils (Rengasamy and...exchangeable cations in calcareous soils (Tucker 1954...FAO 1990). Sodic soils contain high concentrations...and non-sodic soil for Australian conditions...ECEC extractions on ...
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Utilization of compost increases organic carbon and its humin, humic and fulvic acid fractions in calcareous soil
Magazine article from: Compost Science & Utilization
; ...potential to be used as a soil amendment to increase...the organic carbon in calcareous soils of south Florida. Introduction...component of soil; and soil humin is a major nonextractable...fractions depends on soil moisture, type of organic...accumulation of HA content of ...
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Metal-induced chromium(VI) sorption by two calcareous soils.
Magazine article from: Australian Journal of Soil Research
; ...sorption of Cr(VI) in 2 calcareous soils: Calcixerollic Xerochrept...sorption of Cr(VI) by the calcareous soils; however, in both soils the amount of Cr(VI) retained...concentration of 0.07 mM for the CX soil and 0.17 mM for the PX soil. For higher concentrations, sorption of ...
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Effect of continuous cropping on potassium forms and potassium adsorption characteristics in calcareous soils of Iran.(Report)
Magazine article from: Australian Journal of Soil Research
; ...clay fractions for calcareous soils of north-west Iran. The...distribution of K in cultivated soils and adjoining virgin lands...properties; (ii) to group the soil series based on availability...status of sugar beet-growing calcareous soils. Materials and methods Soils...
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