THE CFI RPTD THAT THE STUDENT FLARED THE AIRPLANE ABOUT 50 FT ABV THE RWY AND STALLED IT; THE AIRPLANE DROPPED TO THE RWY AND BOUNCED. HE ASSUMED CONTROL OF THE AIRPLANE FROM THE STUDENT AND ATTEMPTED TO PREVENT A CROSSWIND FROM BLOWING THE AIRPLANE TO THE SIDE OF THE RWY. THE ACFT DRIFTED TO THE SIDE OF THE RWY IN SPITE OF HIS CORRECTIVE EFFORTS AND IMPACTED A TREE. THIS WAS THE CFI'S FIRST FLIGHT GIVING INSTRUCTION AFTER RECENTLY OBTAINING HIS INSTRUCTOR CERTIFICATION. HE HAD ABOUT 3 HRS TOTAL FLT EXPERIENCE IN THIS MODEL ACFT. THE STUDENT HAD 10 HRS TOTAL FLT EXPERIENCE, ALL OF WHICH WAS OBTAINED IN THIS MODEL ACFT. THE STUDENT HAD NOT YET SOLOED. THE CFI REPORTED THAT HE MAY HAVE BEEN COMPLACENT ABOUT THE STUDENT'S ABILITY TO HANDLE THE ACFT; THE STUDENT'S PREVIOUS INSTRUCTOR HAD INDICATED TO HIM EARLIER THAT THE STUDENT WAS SKILLFUL AT HANDLING THE AIRPLANE.