use of teaching materials

Last week, I spent much time on making teaching tools. And part of them has been used in class.

For teaching tools of IT, I have made a model with three layers to show that basic scene in photo impact and what is happened when we use "selection tool". I have shown the properity of the selected picture and compare it with other software like "Paint". Also I have made different picture to show different digital format. I think the students know what I wanted to express and I hope they can realise what happen in photo impact more after using this teaching tools. Actually, I want to show more by using this teaching tools, but since time was limited, I haven't made full use of them.

For teaching tools of Math, I have just used them. I will keep using them in this week so as to show the minimal conditions of proving congruent triangles. The teaching tools are very simple. I use a paper like magnet to cut it into stripes to act as lines and cut some plastics to act as angles. Those lines and angles can be pasted on the blackboard and they are movable. I requried the students to draw triangles with conditions S, A, SS, AA, SA, SSS, SAS, SSA, ASA, AAS, AAA. They can find that with some conditions, they can draw two incongruent triangles and some can only draw two identical triangles. Students were very excited to draw the triangles and they know that first 5 conditions are not sufficient conditions to prove two triangles are congruent. However, they asked me "when will you teach me the proof?", "if they are not sufficient conditions. why do you teach me". @@Students stress too much on solving the problem in the textbook only. They seemed not be willing to explore by themselves. But I knew that they were exploring mathematics but they were not realised. For example, when only given, let say, SA, they knew that if one more information was given, we can have congruent triangles.
Therefore, no matter what the students blaming, I will keep my style of teaching!