Source google image: http://1.bp.blogspot.com/-RxhxdgxqGMs/VewCi41OPYI/AAAAAAAAcSA/chdApnPnxjI/s1600/P%25C3%25A9riode%2B1%2B-%2BPDT%2B1%2B-%2BCe2-CM1-CM2.gif
Plan de travail en cm1
Source google image: http://1.bp.blogspot.com/-RxhxdgxqGMs/VewCi41OPYI/AAAAAAAAcSA/chdApnPnxjI/s1600/P%25C3%25A9riode%2B1%2B-%2BPDT%2B1%2B-%2BCe2-CM1-CM2.gif