I found a more complete listing of her appearences. I don't remember her on Kotter or Mary Hartman but from many of these others, she was pretty busy for a while there:
Misplaced (1989) .... School Teacher
Police Academy 3: Back in Training (1986) .... Cadet Fackler
Police Academy (1984) .... Mrs. Fackler
... aka Police Academy: What an Institution! (UK: video title)
Pandemonium (1982) .... Sandy
Hot T-Shirts (1980) .... Hometown Girl Dancers
The Donna Summer Special (1980) (TV)
Just Tell Me You Love Me (1980) .... Rebecca Taylor
... aka Hawaii Heat (USA: video title)
... aka Maui (USA)
"Angie" (1979) TV Series .... Marie Falco (unknown episodes, 1979-1980)
Incoming Freshmen (1979)
Death Moon (1978) (TV) .... Sherry Weston
... aka Deathmoon (UK)
"Welcome Back, Kotter" .... Rosalie 'Hotsy' Totsy / ... (5 episodes, 1975-1978)
- The Return of Hotsy Totsy (1978) TV Episode .... Rosalie Totzie
- Classroom Marriage (1975) TV Episode .... Rosalie 'Hotsy' Totsy
- No More Mr. Nice Guy (1975) TV Episode .... Rosalie 'Hotsy' Totsy
- Whodunnit? (1975) TV Episode .... Rosalie 'Hotsy' Totsy
- The Great Debate (1975) TV Episode .... Rosalie 'Hotsy' Totsy
"The Love Boat" .... Jane (1 episode, 1978)
- Inspector, The/Very Special Girl, A/Until the Last Goodbye (1978) TV Episode .... Jane
"Forever Fernwood" (1977) TV Series .... Cathy Schumway (1977-1978)
"Gibbsville" .... Ellen (1 episode, 1976)
- Saturday Night (1976) TV Episode .... Ellen
"Mary Hartman, Mary Hartman" .... Cathy Shumway (14 episodes, 1976-1977)
- Episode #1.15 (1976) TV Episode .... Cathy Shumway
- Episode #1.14 (1976) TV Episode .... Cathy Shumway
- Episode #1.13 (1976) TV Episode .... Cathy Shumway
- Episode #1.12 (1976) TV Episode .... Cathy Shumway
- Episode #1.11 (1976) TV Episode .... Cathy Shumway
(9 more)
"Isis" .... Jenny (1 episode, 1975)
... aka The Secret of Isis
- Fool's Dare (1975) TV Episode .... Jenny
The Reincarnation of Peter Proud (1975) .... Suzy
"Movin' On" .... Amy (1 episode, 1975)
- Wedding Bells (1975) TV Episode .... Amy
"Sons and Daughters" (1974) TV Series .... Evie Martinson (unknown episodes, 1974)
Earthquake (1974) (uncredited) .... Kathie (TV version)
The Crazy World of Julius Vrooder (1974) .... Sister
... aka Vrooder's Hooch (USA)
Our Time (1974) .... Ann Alden
... aka Death of Her Innocence (USA: TV title)
Senior Year (1974) (TV) .... Evie Mortenson
A Summer Without Boys (1973) (TV) .... Lenore Atkins
Lisa, Bright and Dark (1973) (TV) .... Mary Nell
American Graffiti (1973) .... Bob Falfa's Girl
Butterflies Are Free (1972) (uncredited) .... Extra in opening credits
Dirty Harry (1971) (uncredited) .... Ann Mary Deacon
Self:2000s
1980s
1970s
"E! True Hollywood Story" .... Herself (1 episode, 2000)
- Welcome Back Kotter (2000) TV Episode .... Herself
"Password Plus" .... Herself (1 episode, 1981)
- Episode dated 30 January 1981 (1981) TV Episode .... Herself
"Chain Reaction" .... Herself (1 episode, 1980)
- Episode dated 18 February 1980 (1980) TV Episode .... Herself
"Get Rich Quick" (1977) TV Series .... Herself/panelist
The Riddlers (1977) (TV) .... Herself
"Dinah!" .... Herself (1 episode, 1976)
... aka Dinah! & Friends
- Episode dated 11 October 1976 (1976) TV Episode .... Herself