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3. http://www.criticalexplorers.org/blog/categories/classroom-teaching/ - The blog linked to the above web site. Do read the pieces by Mike Fishback - particularly the one on Khan Academy.
3. http://www.criticalexplorers.org/blog/categories/classroom-teaching/ - The blog linked to the above web site. Do read the pieces by Mike Fishback - particularly the one on Khan Academy.
+
+= Trignometric Ratios =
+'''Radha Narve, GHS Begur ''' Contrubuted this GeoGebra File <br>
+# The GeoGebra file below is an introduction to basic trignometric ratios <br>
+## consecutive interior angles http://www.karnatakaeducation.org.in/KOER/Maths/trignometry introduction with basic ratios.html
+## Download ggb file here http://www.karnatakaeducation.org.in/KOER/Maths/trignometry introduction with basic ratios.ggb
