1. Lớp 1 - Bài 1 :
[YOUTUBE]http://www.youtube.com/watch?v=CZ1Jgj_QrjA&feature=related[/YOUTUBE]
2. Lớp 1 - Bài 2 :
[YOUTUBE]http://www.youtube.com/watch?v=LZo_NHnzAZM&feature=related[/YOUTUBE]
3. Lớp 2 - Bài 1 :
[YOUTUBE]http://www.youtube.com/watch?v=HT1GzQyIbO0&feature=related[/YOUTUBE]
4. Lớp 2 - Bài 2 :
[YOUTUBE]http://www.youtube.com/watch?v=lPWbMBnBzSg&feature=related[/YOUTUBE]
5. Lớp 3 - Bài 1 :
[YOUTUBE]http://www.youtube.com/watch?v=SWPY3ea_QLE&feature=related[/YOUTUBE]



6. Lớp 3 - Bài 2 :
[YOUTUBE]http://www.youtube.com/watch?v=o-DWmwKiiCI&feature=related[/YOUTUBE]
7. Lớp 4 - Bài 1 :
[YOUTUBE]http://www.youtube.com/watch?v=ZJ6tukzDqPs&feature=related[/YOUTUBE]
8. Tham khảo :
[YOUTUBE]http://www.youtube.com/watch?v=C2O8SjslDHg&feature=related[/YOUTUBE]