Not in your area, but none of the journeys looks too bad, assuming that Southern Rail have given up going on strike

:
1) Crawley to Wilson's School, Mollison Drive, Wallington SM6 9JW
Arrive by 23/04/2018 08:21
49 min 07:25 - 08:13
07:25 from Three Bridges
Walking duration 7 min
07:25 Three Bridges
(Platform 4)
Southern towards London Bridge
07:45 East Croydon
Walk
0.3 mi (7 mins)
08:00 Park Lane Fairfield Halls (Stop KA)
154 towards Morden
08:13 Wilson's School (Stop N)
Walk
154 ft (1 min)
08:13
Wilson's School, Mollison Drive, Wallington SM6 9JW
Tickets and information
London General
Southern - Buy tickets - +44 345 127 2920
2) 06:58 from Three Bridges
10 min
06:58Three Bridges
(Platform 3)
Southern towards Bognor Regis
07:10
07:20Horsham
(Platform 1)
Southern towards London Victoria
08:12Sutton
Walk
0.6 mi (11 mins)
08:22
Sutton Grammar School, Manor Ln, Sutton SM1 4AS
3) 07:25 Three Bridges
(Platform 4)
Southern towards London Bridge
07:45 East Croydon
Walk
285 ft (1 min)
07:53 East Croydon Rail Station (Stop E6)
410 towards Wallington
08:16 Wallington County Grammar School (Stop GV)
(
Wallington County Grammar School, Croydon Rd, Wallington SM6 7PH
(Google search in each case was 'distance Crawley to <name of school>, selecting public transport option, arrival time, tomorrow morning. Unfortunately, copy/paste on my phone plays havoc with formatting, at I think it's just about comprehensible

).